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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ DEFICIT - USD ($)
shares in Thousands, $ in Thousands
Total
Preferred Stock
Common Stock
Additional Paid-in Capital
 [1]
Accumulated Deficit
Accumulated Other Comprehensive (Loss) Income
Beginning balance (shares) at Dec. 31, 2022   25 10,847 [1]      
Beginning balance at Dec. 31, 2022 $ (70,118) $ 0 $ 11 [1] $ 793,952 $ (857,751) $ (6,330)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net (loss) income (10,041)       (10,041)  
Foreign currency translation adjustment (525)         (525)
Exercises of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan, net of taxes withheld (shares) [1]     37      
Exercises of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan, net of taxes withheld 49     49    
Issuance of common shares in connection with a public offering, net of issuance costs (shares) [1]     803      
Issuance of common shares in connection with a public offering, net of issuance costs 6,058   $ 1 [1] 6,057    
Share-based compensation 3,762     3,762    
Preferred stock dividends 0     1,462 (1,462)  
Ending balance (shares) at Jun. 30, 2023   25 11,687 [1]      
Ending balance at Jun. 30, 2023 (70,815) $ 0 $ 12 [1] 805,282 (869,254) (6,855)
Beginning balance (shares) at Mar. 31, 2023   25 10,937 [1]      
Beginning balance at Mar. 31, 2023 (72,725) $ 0 $ 11 [1] 797,079 (863,579) (6,236)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net (loss) income (4,936)       (4,936)  
Foreign currency translation adjustment (619)         (619)
Exercises of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan, net of taxes withheld (shares) [1]     32      
Exercises of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan, net of taxes withheld (28)     (28)    
Issuance of common shares in connection with a public offering, net of issuance costs (shares) [1]     718      
Issuance of common shares in connection with a public offering, net of issuance costs 5,529   $ 1 [1] 5,528    
Share-based compensation 1,964     1,964    
Preferred stock dividends 0     739 (739)  
Ending balance (shares) at Jun. 30, 2023   25 11,687 [1]      
Ending balance at Jun. 30, 2023 (70,815) $ 0 $ 12 [1] 805,282 (869,254) (6,855)
Beginning balance (shares) at Dec. 31, 2023   25 11,879 [1]      
Beginning balance at Dec. 31, 2023 (102,105) $ 0 $ 12 [1] 810,138 (906,928) (5,327)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net (loss) income (3,831)       (3,831)  
Foreign currency translation adjustment (93)         (93)
Exercises of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan, net of taxes withheld (shares) [1]     31      
Exercises of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan, net of taxes withheld (6)     (6)    
Share-based compensation 1,586     1,586    
Issuance of common stock warrants, net of issuance costs 2,686     2,686    
Preferred stock dividends 0     1,598 (1,598)  
Ending balance (shares) at Jun. 30, 2024   25 11,910 [1]      
Ending balance at Jun. 30, 2024 (101,763) $ 0 $ 12 [1] 816,002 (912,357) (5,420)
Beginning balance (shares) at Mar. 31, 2024   25 11,883 [1]      
Beginning balance at Mar. 31, 2024 (105,589) $ 0 $ 12 [1] 811,637 (912,173) (5,065)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net (loss) income 624       624  
Foreign currency translation adjustment (355)         (355)
Exercises of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan, net of taxes withheld (shares) [1]     27      
Exercises of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan, net of taxes withheld 2     2    
Share-based compensation 869     869    
Issuance of common stock warrants, net of issuance costs 2,686     2,686    
Preferred stock dividends 0     808 (808)  
Ending balance (shares) at Jun. 30, 2024   25 11,910 [1]      
Ending balance at Jun. 30, 2024 $ (101,763) $ 0 $ 12 [1] $ 816,002 $ (912,357) $ (5,420)
[1] Adjusted retroactively for reverse stock split that occurred on January 24, 2024, see Note 1